Draft rigging



'T. H. SYMINLH DRAFT meme. AFPLICAILON FfiEl) MAY 20. 1918.

1 7 mm m m x, n 2 E5 R MN 1mm em T. H. SYMINGI ON. DRAFT RIGGING.

- APPLICATION FILED MAY 20, 1918.

1,409,039. v \Pawmedmr. 7,1922.

2 SHEETS-SHEET 2.

UNITED STATES PATENT ()FFEQYL.

THOMAS H. SYMINGTON, F ROQHESTER, NEW YORK, ASSIGNOR, BY DIE-E5. ASSIGH- MEN'ES, TO THE T. H. SYMINGTON COMPANY. 0F NEW YORK, N. 5,, A CORPOEA- EON OF DELAWARE.

Application filed May 20,

Rigging; and I do hereby declare the fol loW-ing'to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it apper tains to make and use the same.

The invention relates to draft rigging for railway cars and more particularly to novel means for greatly increasing the capacity of draft rigging to absorb shocks delivered thereto by the inward movement of the coupler under buffing blows. To this end, the main features of my invention, generally stated,.comprise a rigid back-stop. and draft sill, the casting provided with a friction face or surface, and spring-actuated wedging and wedging friction members interposed between the said back stop and a movable element of the draft rigging, said -friction members only being operable under extreme butting shocks.

There are features of the invention which relate to the form and manner of operation of-the device, as will be apparent from the more detailed description of the invention when taken. in connection, with the accompanying drawings which have been chosen to illustrate one form of my device, and in which- Figure 1 is a top plan View partially in section of a draft rigging embodying my invention.

Figure 2 is a central. longitudinal vertical section of the device as shown in Figure 1, portions of the device beingin elevation.

Figure 5 is a fragmentary plan view partially in section of the "friction mechanism, the resistance mechanism being omitted.

Figure 4 is a longitudinal central sectional View showing the relative positions of the wedging and wedging friction mechanism under full buff, and

Figures 5 and 6 are respectively perspective views of a wedging friction member and the wedge member respectively. 2

Throughout the specification and draw ings like parts are designated alike.

In the drawings the numerals 1, ldesignate portions of the center or draft sills'of 9. car to which the draft rigging is connected.

Specification of Letters Patent.

Patented Mar. 2, 19.22.

1918. Serial No. 235,528.

The cheek-plates 2, 2. in the form of draft rigging chosen for illustration. are connected to the outer faces of the respective sills by means of rivets 3, 3 or other suit able fastening means. Each cheek-plate is provided with a pair of lon ritiulinally ex tending slots 4 and 5, the said slots being in alinement with slots 6 in the yoke Y and with the slot. 8 in the coupler 1 A he 10 adapted to extend through the alined slots in the several elements and serves to operativcly connect the said coupler and yoke. The. said key normally contacts the rear wall of the coupler slot 8 and the forward walls of the yoke slots 6, and is so located in the slots 4 of the said pl tes as to have a greater travel rearwardly than forwardly. I Passing through the slots 5 in the checkplates 2 and through the elongated slots ii in the yoke 7 and-through the slots it? in the front follower 13 is the key 14. This key normally contacts the rear wall of the follower slot 12 and the forward walls of the slots 5, 5 in the cheek-plates, and serves to transmit the draft strains imparted to the said follower to the cheer-plates 2. Seated against the rear end of the yoke v. is the rear follower.15 which may be and preferably is of Hshape having upper and lower projecting arms 16. The upper arms extend over the yoke and serve to maintain the follower in position.

Interposed between the front and rear followers 13 and 15 is the cushioning or resistance mechanism 16 which may be-of c any desired form, a friction mechanism. for

convenience, beinq diagrammatically illustrated by dotted lines.-- v Bridging the space between the draft sills and rigidly connected to the same is the combined back stop and tie casting- 17. "E lie said casting is spaced rearwardly from liJQ inner end of the yoke and is provided with a transversely extending face or surface 18.

The said surface is formed by the front face of the transversely extending web 19. This web is connected to the side walls 20' of the said casting and-'is braced and.

strengthened by the rearwardly extending ribs or flanges 21' and 22.

To the inner faces of the sills l, iLClJflCBDt" the rear end of the yoke -7, are connected the stop members 23, the inner ends of which terminate in line with the rear face of the yoke when the same ism normal position.

Between the rear end of the yoke 'Z and the face .18 'of' the stop casting is arranged the auxiliary resistance mechanism 2-1 which may and preferably does comprise a wedging block 25, a plurality of wed ng friction blocks 26, 26 and means GXiIGllt mg transversely of the draft sills for yieldmgly resisting the movement of said wedging and wedging friction blocks, said means serving also to maintain said block in operative position. The ,wed'g'ing block 25 is provided with a. yoke engaging face 27, and 1s adapt ed to seat at its ends against the rear faces of the stop members 23. On its opposite face the block 25is provided with a plurality of converging wedging faces 28, 28, said faces being interrupted by a plurality of rearwardly and transversely extending ribs or flanges 29 which are provided with flat inner faces. Intermediate a pair of the ribs 29 the wedgin faces 28 'are cut away as at 31 to provide a bolt receiving socketor recess 32. The wedg ing frictionblocks 26 each comprise a plurality of connected walls 33 and 34 which are arranged substantially at right angles to each other, the said walls being connected adjacent their top and bottom by webs or flanges 35 and 36, respectively. Intermediate the said Webs 35 and 36 the walls are also connected by a plurality of webs 37 and 38. The last-named webs are spaced from the flanges 35 and 36 respectively a distance equal to' the width of one of the ribs 29. Intermediate the Webs 37 and 38 the wall 33 is provided with abolt receiving openin 39. In'position the walls 34: of the said b ocks 26 are adapted to frictionally engage the face 18 of the said stop casting, and the outer faces of the webs 35 .to 38, inclusive, are adapted to engage the wedging faces 28 of the block 25 intermediate the ribs 29. The lateral edges of the ribs 29 are adapted to engage the inner faces of the walls 33 to limit the approach of the wedging blocks 26. The faces 30 of the said ribs 29 are in normal position of the several parts spaced fromthe adjacent faces of the 'Walls 34, but are adapted to contact the same to limit the movement of the wedging block 25. The tongue and groove connection between the block 25 and the blocks 26 not only maintains these blocks in correct position during the operation thereof, but also serves as a means for directly transmitting to the stop casting 17 the loads transmitted to the draft rigging in excess of the capacity of both the cushioning member 16 and the auxiliary member 24. It will be noted from the disclosure that when the faces 30 of the ribs 29 engage the faces of the walls 34 that the entire auxiliary mechanism is locked against movement and acts as a solid column to transmit the excessive loads to the stop casting.

The blocks 25 and 26 are carried by a transversely extending rod 40 which is passed through the sills and through the openings 39 in the said blocks 26. The outer ends of the said rod are provided with adjustable washers 41, and interposed between each washer and the adjacent block 26 is a spring 42 and a thimble block 43. The said thiinble blocks extend through the sills and bear at one end against the wall 33 of the blocks 26 and at the opposite end against the inner end of the spring 42. The washers and the thimble blocks form spring seats for the respective ends of the springs 42. From the foregoing description it will be clear that an inward movement of the yoke from'its normal position, which will be permitted by the rearward elongation of the slots 4 and 5 in the cheek-plates, will be resisted by the springs 42 and by the friction generated be tween the block 25 and the blocks 26 and becapacity which occupies a relatively small amount of space and which in no way interferes with the usual underframe arrange ment. I

Having now fully described my invention, although it'is to be understood that by the foregoing I do not intend to limit the scope of my invention, and that the terms used are to be understood in their descriptive and desire to secure by Letters Patent is:

1. In a draft rigging the combination with draft sills, of a rigid combined back stop and tie casting, a coupler, a cushioning mechanism therefor, means for operatively connecting said coupler and cushioning mechanism and means interposed between said cushioning mechanism and said tie casting and including members which slidably engage the latter, said means being adapted to afford a progressively increasing resistanc e'to' bufiing shocks which exceed the capacity of said cushioning mechanism.

2. In a draft rigging the combination with draft sills, of a coupler, a yoke connected thereto, a cushioning mechanism within the yoke and adapted to absorb the normal load of bufiing and draft, a combined back stop and tie casting connected to the said draft 5111s and spaced from the said yoke and means interposed between the said yoke and and not in their limiting sense, what I claim back stop and slidably engaging one of said eieinents for absorbing buifing loads in ex- 0;? the capacity of the said cushionin Zienisri n a d sills,

rigging the combination with of a combined stop and tie castonnected thereto, a yoke, and transe' act ng means involving friction produc'ng elements interposed between said yoke and casting, the latter having a fiat face cooperating with said transversely acting means, said means being adapted to contact the said casting and adapted to resist rearward movement of said yoke from normal and means for supporting said first named means in position. I

l in a draft rigging the combination with draftsiils, of a herizontaily disposed yoke, cushioning mechanism Within the same, a stop casting positioned intermediate the said sills and in rear of said yoke, and means for opposing the rearward movement of the said yoke, said means including awedge block contacting the said yoke, and a plurality of Wedging blocks interposed between said first named block and said casting and adapted to frictionally engage both of said members. I

5. In a draft rigging, the combination with a pair of draft sills, a yoke and a back stop spaced from the rear end of said yoke, said back stop being adapted to connect ,the said sills, of means interposed between said yoke .and back stop and slidably engaging the latter, said means comprising a Wedge block, and a plurality of laterally moving wedgin'g friction blocks, means for resisting the movement of said blocks, said blocks and wedge being provided with intermeshing tongue and groove connections.

In testimony whereof I affix my signature.

THOMAS H. SYMINGTON. 

